BOILER FUNDAMENTALS EXAM REVIEW
QUESTIONS WITH ACCURATE SOLUTIONS
2026
▶ A fusible plug that contains a tin core that melts at what temperature and
is used as the last warning in a low water condition? Answer: 450 degrees
F
▶ Cut-out pressure is the pressure at which the pressure controller does
what to the burner? Answer: Shuts off
▶ Cut-in pressure is the pressure at which what turns on the burner?
Answer: Pressure controller
▶ The compound gauge is a gauge that measure both vacuum and ?
Answer: Pressure
▶ Chattering is the rapid opening and closing of a safety valve due to an
improperly set? Answer: Blowdown
▶ Carryover is water carried over into steam lines that causes what and
possible rupture? Answer: Hammering
▶ Calibration is the ______ of gauges or instruments to ensure proper
readings? Answer: Adjustment
▶ The bottom blowdown valve is used to _______ water from the bottom of
the boiler to remove sludge, and sediment to control chemical
concentrations. Answer: Discharge or Purge
▶ The boiler vent is a ______ that is located at the highest point of the
steam side of the boiler, it is used to purge air when filling the boiler or
printing a vacuum when emptying the boiler of water Answer: Air cock
QUESTIONS WITH ACCURATE SOLUTIONS
2026
▶ A fusible plug that contains a tin core that melts at what temperature and
is used as the last warning in a low water condition? Answer: 450 degrees
F
▶ Cut-out pressure is the pressure at which the pressure controller does
what to the burner? Answer: Shuts off
▶ Cut-in pressure is the pressure at which what turns on the burner?
Answer: Pressure controller
▶ The compound gauge is a gauge that measure both vacuum and ?
Answer: Pressure
▶ Chattering is the rapid opening and closing of a safety valve due to an
improperly set? Answer: Blowdown
▶ Carryover is water carried over into steam lines that causes what and
possible rupture? Answer: Hammering
▶ Calibration is the ______ of gauges or instruments to ensure proper
readings? Answer: Adjustment
▶ The bottom blowdown valve is used to _______ water from the bottom of
the boiler to remove sludge, and sediment to control chemical
concentrations. Answer: Discharge or Purge
▶ The boiler vent is a ______ that is located at the highest point of the
steam side of the boiler, it is used to purge air when filling the boiler or
printing a vacuum when emptying the boiler of water Answer: Air cock
